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1 теплоёмкость
1) Aviation: heat-sink capacity2) Naval: caloric capacity3) Medicine: calorific antiserum4) Engineering: heat, heat absorption, heating capacity, specific heat5) Construction: calorific receptivity, heat absorptive capacity, heat storage capacity6) Physics: calorific capacity, heat capacity, thermal capacity, specific heat capacity8) Power engineering: heat capacitance, thermal capacitance9) Drilling: heat content11) Thermodynamics: thermal mass12) Combustion gas turbines: heating power13) Electrical engineering: (удельная) specific heat14) Cement: caloric receptivity -
2 обеспечение теплом
обеспечение теплом
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
heat supply
The provision of heating fuel, coal or other heating source materials, or the amount of heating capacity, for the use of a municipality, or other heat user. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-английский словарь нормативно-технической терминологии > обеспечение теплом
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3 способность
ability, capability, capacity, power, property* * *спосо́бность ж.
ability, capability, capacity, powerспосо́бность восстана́вливаться — recoverabilityоблада́ть спосо́бностью, напр. поглоща́ть га́зы — have a capacity for, e. g., absorbing [taking up] gases, have the property of, e. g., absorbing [taking up] gasesспосо́бность преодолева́ть подъё́м авто — hill-climbing ability, hill-climbing capacity, hillclimbing performanceпроявля́ть спосо́бность к … — show the (cap)ability to do … [for doing …]спосо́бность рассла́иваться — segregabilityспосо́бность сме́шиваться — miscibilityвключа́ющая спосо́бность (контактов переключателей, реле и т. п.) — making capacityвя́жущая спосо́бность — cementing [binding] powerспосо́бность дви́гателя к холо́дному за́пуску — cold-starting ability, cold-starting performanceспосо́бность деформа́ции — deformabilityдисперги́рующая спосо́бность — dispersion capacity, ability, dispersive powerдубя́щая спосо́бность — tanning propertyзаде́рживающая спосо́бность — retentivityизбира́тельная спосо́бность — selectivityизлуча́тельная спосо́бность — emissive [radiating] powerизоляцио́нная спосо́бность — insulating valueионизи́рующая спосо́бность — ionizing power, ionizing capacityисправля́ющая спосо́бность телегр. — margin, (printing) rangeспосо́бность к волоче́нию — drawabilityспосо́бность к дли́тельным перегру́зкам — sustained overload capacityспосо́бность к зака́ливанию — hardenabilityкле́ящая спосо́бность — adhesive abilityспосо́бность к прилипа́нию — cohesivenessспосо́бность кра́ски, кро́ющая — riding [covering] power of paintпридава́ть кро́ющую спосо́бность кра́ске — give body to a paintспосо́бность к сжа́тию — compressibilityспосо́бность к уса́дке — shrinkabilityнагру́зочная спосо́бность — load-carrying capacityокисли́тельная спосо́бность — oxidation powerокисли́тельно-восстанови́тельная спосо́бность — redox powerострукту́ривающая спосо́бность ( почвы) — structure-forming capacityотключа́ющая спосо́бность (контактов переключателей, реле и т. п.) — breaking [interrupting] capacityперегру́зочная спосо́бность — overload capacityпроника́ющая спосо́бность — penetrability, penetrating powerпропускна́я спосо́бность — (carrying) capacityпропускна́я спосо́бность водосли́ва — spillway capacityпропускна́я спосо́бность водосли́ва для па́водковых вод — flood-carrying capacity of a spillwayпропускна́я спосо́бность доро́ги — road [traffic] capacityпропускна́я спосо́бность канала́ — canal capacityпропускна́я спосо́бность ста́нции1. ж.-д. terminal capacity2. тлф. traffic-carrying capacityпропускна́я спосо́бность ствола́ горн. — shaft capacityпропускна́я спосо́бность трубы́ — pipe capacityпропускна́я, эксплуатацио́нная спосо́бность ( слов в минуту) телегр. — traffic speed, wpm; traffic-carrying capacity, wpmразреша́ющая спосо́бность — resolving power, resolutionразреша́ющая спосо́бность по а́зимуту — azimuth resolutionразреша́ющая спосо́бность по вре́мени — time resolutionразреша́ющая спосо́бность по да́льности — range resolutionразреша́ющая спосо́бность по углу́ ме́ста — elevation resolutionразреша́ющая спосо́бность по эне́ргии — energy resolutionразреша́ющая спосо́бность счё́тчика и́мпульсов — resolving time of a pulse counterрастворя́ющая спосо́бность — dissolving powerреакцио́нная спосо́бность — reactivityре́жущая спосо́бность — cutabilityсвязу́ющая спосо́бность — binding [cementing] powerсма́зывающая спосо́бность — lubricating power, lubricityсма́чивающая спосо́бность — wetting powerтеплоаккумули́рующая спосо́бность — heat-storage capacityтеплотво́рная спосо́бность — calorific power, calorific valueтеплотво́рная, вы́сшая спосо́бность — high [gross] heat(ing) [calorific] valueтеплотво́рная, ни́зшая спосо́бность — low [net] heat(ing) [calorific] valueуде́рживающая спосо́бность — holding capacityуплотня́ющая спосо́бность — sealing capacityэгализи́рующая спосо́бность — levelling capacityэкстраги́рующая спосо́бность — extractive power, extractivityэмульги́рующая спосо́бность — emulsifying power -
4 теплопроводность
1) General subject: permeability of heat, thermal conductivity2) Engineering: conductance, conduction, heat conduction3) Construction: K value, caloric conductibility, heat conductance, heat conductivity factor, heat transfer by conduction, temperature conductivity4) Automobile industry: capacity of heat transmission, permeability to heat5) Architecture: heat transmission (U-value)6) Forestry: thermal conductivity (почвы)7) Metallurgy: conductivity for heat8) Textile: transmission of heat, transmission property9) Physics: calorific conduction, thermal conduction, transcalency11) Metrology: thermal conductivity coefficient12) Coolers: heat load capacity, thermal permeability13) Ecology: thermal diffusivity14) Power engineering: (активная) conductance15) Drilling: heat transfer16) Automation: heat-transfer capacity, heat-transmission capacity17) Aviation medicine: heat conductivity (удельная)18) Makarov: diathermancy, heat conduction (вид теплопередачи), thermal conductivity (коэффициент теплопроводности)19) Combustion gas turbines: thermal transmittance21) Cement: conducting power, conductivity, heat transmission, temperature diffusivity -
5 мощность
depth, capability, capacity, duty, power, (напр. пласта, залежи) thickness, watt, wattage* * *мо́щность ж.1. ( физическая величина) powerбольшо́й мо́щности — high-powerма́лой мо́щности — low-powerобме́ниваться [осуществля́ть обме́н] мощностя́ми ( между энергосистемами) — exchange power (between energy systems)отбира́ть мо́щность — take off powerответвля́ть (часть) мо́щности — tap some powerотдава́ть мо́щность — put out [deliver] powerпередава́ть мо́щность (напр. из каскада в каскад или в нагрузку) — transfer power (e. g., from stage to stage or to load)передава́ть мо́щность (по ли́нии) — transmit power (over a line)поглоща́ть мо́щность — absorb powerпо́лной мо́щности — full-powerмо́щность прохо́дит — power is transmittedчасть мо́щности рассе́ивается на, напр. ано́де, колле́кторе — some power is dissipated at, e. g., anode, collector2. мат. cardinality, cardinal number3. ( производственная) capacity4. ( горных пород) thicknessавари́йная мо́щность — emergency powerакти́вная мо́щность — active [true] powerба́зисная мо́щность — base powerбуксиро́вочная мо́щность мор. — tow-rope horse powerмо́щность вагоноопроки́дывателя — tonnage of a car dumperвзлё́тная мо́щность — take-off powerмо́щность в и́мпульсе рлк. — peak (pulse) powerмо́щность в лошади́ных си́лах — horse-powerмо́щность возбужде́ния ( генераторной лампы) — driving powerмо́щность вскры́ши горн. — thickness of stripping, cover thicknessвходна́я мо́щность — input powerвыходна́я мо́щность — output power, power outputвыходна́я, номина́льная мо́щность ( радиоприёмника) — maximum undistorted outputмо́щность дви́гателя — power [rating] of an engineмо́щность дви́гателя, литро́вая мор. — power-to-volume ratioдли́тельная мо́щность — continuous powerмо́щность до́зы облуче́ния — dose [dosage] rateдопусти́мая мо́щность — power-carrying capacityдопусти́мая, максима́льно мо́щность — overload capacityедини́чная мо́щность — (single-)unit powerмо́щность зажига́ния резона́нсного разря́дника — firing powerмо́щность защи́тного устро́йства, поро́говая — break-down powerмо́щность зву́ка — sound [acoustic] powerмо́щность излуче́ния — radiating [emissive] powerиндика́торная мо́щность — indicated powerмо́щность исто́чника — source strength, source powerка́жущаяся мо́щность — apparent powerкоммути́руемая мо́щность ( магнитоуправляемого контакта) — power handlingмо́щность коро́ткого замыка́ния — short-circuit powerмо́щность котла́ — boiler capacityкрюкова́я мо́щность ( трактора) — draught powerмаксима́льная мо́щность — maximum (output) powerмаксима́льная, продолжи́тельная мо́щность ав. — maximum continuous powerмгнове́нная мо́щность — instantaneous powerмо́щность мно́жества — cardinality [cardinal number] of a setмо́щность на валу́ — shaft power, shaft outputмо́щность на зажи́мах генера́тора — generator terminal output, generator terminal capacityмо́щность на испыта́нии мор. — trial horse-powerмо́щность нака́чки — pump(ing) powerмо́щность на му́фте — coupling powerмо́щность на приводно́м валу́ — power at the drive shaftмо́щность на режи́ме ма́лого га́за ав. — idling powerмо́щность на режи́ме ма́лого га́за, назе́мная ав. — ground idling powerмо́щность на режи́ме ма́лого га́за, полё́тная ав. — flight idling powerмо́щность на согласо́ванной нагру́зке — matched-load powerмо́щность несу́щей — carrier outputномина́льная мо́щность — rated power, power ratingмо́щность облуче́ния — exposure [irradiation] rateотдава́емая мо́щность — power deliveredмо́щность отражё́нного сигна́ла рлк. — echo-signal powerпарази́тная мо́щность — parasitic lossesмо́щность пи́ка — peak powerмо́щность пита́ния — supply powerмо́щность пласта́ — thickness of a seam, seam thicknessмо́щность пласта́, поле́зная вынима́емая — useful worked thickness of a seamмо́щность пласта́, по́лная — full [total] thickness of a seamмо́щность пласта́, рабо́чая — working thickness of a seamпоглоща́емая мо́щность изм. — terminating powerподводи́мая мо́щность — power inputмо́щность подогре́ва — heater powerполе́зная мо́щность1. useful [net] power2. net capacityпо́лная мо́щность — total [gross] powerпоса́дочная мо́щность ав. — landing powerмо́щность пото́ка — rate of flowпотребля́емая мо́щность — demand, power consumptionпотребля́емая мо́щность в ва́ттах — watt consumption, wattageпотре́бная мо́щность — required powerпрое́ктная мо́щность — design outputпроизво́дственная мо́щность — (productive) capacityпроизво́дственная мо́щность по вы́плавке ста́ли в сли́тках — ingot capacityпроизво́дственная мо́щность по произво́дству се́рной кислоты́ — productive capacity for sulphuric acidпроизво́дственная мо́щность ша́хты — productive capacity of a mine, output of a mineпроса́чивающаяся мо́щность — leakage powerпроходя́щая мо́щность — feed-through powerпускова́я мо́щность — starting powerрабо́чая мо́щность — operating powerмо́щность радиоприё́мника, выходна́я — receiver outputмо́щность радиоприё́мника, выходна́я норма́льная — normal test output of a receiverразрывна́я мо́щность — breaking [rupturing] capacityрасполага́емая мо́щность — available [disposable] powerрассе́иваемая мо́щность — dissipated powerмо́щность рассе́яния — power dissipationмо́щность рассе́яния на ано́де — anode (power) dissipationмо́щность рассе́яния на колле́кторе — collector (power) dissipationрасчё́тная мо́щность — rated capacityреакти́вная мо́щность — reactive powerрезе́рвная мо́щность1. spare capacity2. эл. reserve power; рлк. standby powerсре́дняя мо́щность — average [mean] powerсре́дняя мо́щность непреры́вного излуче́ния рлк. — average CW powerмо́щность ста́нции — station capacityсумма́рная мо́щность1. total power2. aggregate capacityтеплова́я мо́щность — heat(ing) rating; beat output; thermal capacityмо́щность ти́па колеба́ний — modal powerтормозна́я мо́щность — brake horse-powerмо́щность турби́ны — turbine capacityмо́щность турби́ны, номина́льная — maximum continuous ratingмо́щность турби́ны, электри́ческая — generator output of a turbineтя́говая мо́щность1. авто tractive power2. мор. towrope horse-powerуде́льная мо́щность — power density, specific powerуде́льная мо́щность пе́чи — specific power ratingмо́щность устано́вки — plant capacityустано́вленная мо́щность — installed capacity, installed powerмо́щность уте́чки — leakage powerмо́щность холосто́го хо́да — shut-off capacityшумова́я мо́щность — noise powerшумова́я, относи́тельная мо́щность — noise ratioшумова́я, эквивале́нтная мо́щность — noise equivalent powerэлектри́ческая мо́щность — electric powerэффекти́вная мо́щность — effective horse-power* * * -
6 обеспечение теплом
обеспечение теплом
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
heat supply
The provision of heating fuel, coal or other heating source materials, or the amount of heating capacity, for the use of a municipality, or other heat user. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > обеспечение теплом
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7 местное теплоснабжение
местное теплоснабжение
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
local heat supply
The provision of heating fuel, coal or other heating source materials, or the amount of heating capacity, for the use of a specific local community. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-английский словарь нормативно-технической терминологии > местное теплоснабжение
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8 обеспечение теплом
обеспечение теплом
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
heat supply
The provision of heating fuel, coal or other heating source materials, or the amount of heating capacity, for the use of a municipality, or other heat user. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > обеспечение теплом
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9 местное теплоснабжение
местное теплоснабжение
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
local heat supply
The provision of heating fuel, coal or other heating source materials, or the amount of heating capacity, for the use of a specific local community. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > местное теплоснабжение
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10 местное теплоснабжение
местное теплоснабжение
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
local heat supply
The provision of heating fuel, coal or other heating source materials, or the amount of heating capacity, for the use of a specific local community. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > местное теплоснабжение
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11 обладать
. иметь•These types of lavae are of high viscosity.
•The observer is equipped (or provided) with a device that makes it possible to...
•This material is abrasion resistant ( обладает высоким сопротивлением истиранию).
•These refractories do not exhibit acidic or basic properties.
•The automatic press embodies (or has, or includes, or incorporates) all the regular features of the semi-automatic press.
•The capacitor features extraordinary stability.
•The corrugation offers an enlarged area and so increases total heat transfer from...
•These alloys possess good tensile strength.
•Carbon-fibre materials offer nearly all the attractive features of glass-fibre materials.
•The adrenals show remarkable similarity of structure.
•This type of capacitor affords greater capacity for a given volume.
Русско-английский научно-технический словарь переводчика > обладать
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12 длительный допустимый ток
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Русско-английский словарь нормативно-технической терминологии > длительный допустимый ток
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13 длительный допустимый ток
- Strombelastbarkeit, f
- Dauerstrombelastbarkeit, f
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Русско-немецкий словарь нормативно-технической терминологии > длительный допустимый ток
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14 длительный допустимый ток
- courant permanent admissible, m
- courant admissible, m
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Русско-французский словарь нормативно-технической терминологии > длительный допустимый ток
-
15 уменьшать вдвое
Уменьшать вдвоеThe load carrying capacity of a complex shaped component may be reduced by a factor of 2 to achieve a given life.This means that during pseudo film boiling the lead constant in equation (...) should be cut in half.Doubling the solidity would alleviate the problems of vibration present for long heat exchangers, since the heat exchanger length could be halved.Русско-английский научно-технический словарь переводчика > уменьшать вдвое
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16 в функции
•Load against (or versus, or vs.) strip thickness ( in a graph).
•Figure 2 shows the maximum rates of lactic acid production as a function of...
•The pressure drop versus flowrate curve...
•The transmission of the probe radiation was studied as a function of the laser frequency.
* * *В функции -- as a function of, in terms of, versus, vs, againstThe heat transfer coefficients from equation (...) are plotted in Fig. as a function of time.The solutions were used as the basis for complex polynomial fits for dimensionless load capacity in terms of inlet film thickness ratio.Figure 3 shows the measured local water bulk temperature Tc versus the column length.Figure shows the changes of Gibbs free-energy in various reactions vs the temperature.Fig. 9 shows a graph of Ra against sliding distance.Русско-английский научно-технический словарь переводчика > в функции
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17 указывать на
•The high heat flow pointed to some kind of thermal peculiarity.
•The intensity of an ion signal is indicative (or suggestive) of the stability of the ion.
•The Precambrian development of the blue-green algae is attested by the massive calcium-rich rock formations they left behind.
•Equation (.22) suggests that DAB should be inversely proportional to total pressure.
•This suggests that other nonvector mesons may participate.
•That there was an appreciable liquid resistance is suggested (or indicated) by recent tests of...
•The irregularities observed... are evidence for (or of) the existence of...
•This points up (or to) the significance of thunderstorms as a major source of... The diverse uses of these compounds testify to the commercial value of fluoroalkanes.
•This clearly shows the need for an atom reservoir with...
•The term porosity gives an indication of the capacity of a rock to hold a fluid in storage.
•He has pointed to the probable existence of...
•The lack of sediment attested to the youth of the mid-ocean ridges.
•The rotation curves imply (or intimate) the presence of...
II•A compass needle will point at (or to, or toward) the magnetic poles.
Русско-английский научно-технический словарь переводчика > указывать на
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18 переменное оттаивание
переменное оттаивание
-
[Интент]Параллельные тексты EN-RU
Alternate defrost saves energy by reducing the need for auxiliary heating during defrost cycles.
With Alternate defrost when one circuit starts a defrost cycle the other circuit is running in heat pump at full capacity to minimize the need for auxiliary heating.
Alternate defrost is available as standard on all dual circuit BALTIC™ units starting from size 045kW.
[Lennox]Переменное оттаивание уменьшает потребление электроэнергии за счет сокращения дополнительного обогрева теплообменника в процессе оттаивания.
При переменном оттаивании один холодильный контур начинает цикл оттаивания, а другой – работает в режиме теплового насоса на полной мощности, сокращая таким образом до минимума потребность в дополнительном обогреве.
Переменное оттаивание используется в качестве стандартной функции во всех моделях кондиционеров BALTIC™ с двумя холодильными контурами, начиная с типоразмера 045kW.
[Перевод Интент]
Тематики
EN
Русско-английский словарь нормативно-технической терминологии > переменное оттаивание
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19 общепринятый
•Universally adopted standard conditions require that...
•The accepted industry standard is a cushion capacity of...
•So far we have described only conventional heat-transfer methods for generating electricity in a laser-power plant.
•The commonly (or universally) accepted model of the -centre is an electron trapped at a negative-ion vacancy.
Русско-английский научно-технический словарь переводчика > общепринятый
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20 повышать
•The synchrotron boosts the energy of the protons for injection into a larger synchrotron.
•The kaolin adds strength, abrasion resistance, and rigidity.
•Molybdenum enhances the resistance of stainless steels to pitting corrosion.
•The addition of the new unit will raise (or increase) the capacity from 80 to 135 mln lb/yr.
•Production could be stepped up quickly.
Русско-английский научно-технический словарь переводчика > повышать
- 1
- 2
См. также в других словарях:
Capacity for heat — Capacity Ca*pac i*ty (k[.a]*p[a^]s [i^]*t[y^]), n.; pl. {Capacities} ( t[i^]z). [L. capacitus, fr. capax, capacis; fr. F. capacit[ e]. See {Capacious}.] 1. The power of receiving or containing; extent of room or space; passive power; used in… … The Collaborative International Dictionary of English
Capacity for heat — Heat Heat (h[=e]t), n. [OE. hete, h[ae]te, AS. h[=ae]tu, h[=ae]to, fr. h[=a]t hot; akin to OHG. heizi heat, Dan. hede, Sw. hetta. See {Hot}.] 1. A force in nature which is recognized in various effects, but especially in the phenomena of fusion… … The Collaborative International Dictionary of English
capacity for heat — Power of absorbing heat • • • Main Entry: ↑capacity … Useful english dictionary
Capacity — Ca*pac i*ty (k[.a]*p[a^]s [i^]*t[y^]), n.; pl. {Capacities} ( t[i^]z). [L. capacitus, fr. capax, capacis; fr. F. capacit[ e]. See {Capacious}.] 1. The power of receiving or containing; extent of room or space; passive power; used in reference to… … The Collaborative International Dictionary of English
Heat — (h[=e]t), n. [OE. hete, h[ae]te, AS. h[=ae]tu, h[=ae]to, fr. h[=a]t hot; akin to OHG. heizi heat, Dan. hede, Sw. hetta. See {Hot}.] 1. A force in nature which is recognized in various effects, but especially in the phenomena of fusion and… … The Collaborative International Dictionary of English
Heat engine — Heat Heat (h[=e]t), n. [OE. hete, h[ae]te, AS. h[=ae]tu, h[=ae]to, fr. h[=a]t hot; akin to OHG. heizi heat, Dan. hede, Sw. hetta. See {Hot}.] 1. A force in nature which is recognized in various effects, but especially in the phenomena of fusion… … The Collaborative International Dictionary of English
Heat producers — Heat Heat (h[=e]t), n. [OE. hete, h[ae]te, AS. h[=ae]tu, h[=ae]to, fr. h[=a]t hot; akin to OHG. heizi heat, Dan. hede, Sw. hetta. See {Hot}.] 1. A force in nature which is recognized in various effects, but especially in the phenomena of fusion… … The Collaborative International Dictionary of English
Heat rays — Heat Heat (h[=e]t), n. [OE. hete, h[ae]te, AS. h[=ae]tu, h[=ae]to, fr. h[=a]t hot; akin to OHG. heizi heat, Dan. hede, Sw. hetta. See {Hot}.] 1. A force in nature which is recognized in various effects, but especially in the phenomena of fusion… … The Collaborative International Dictionary of English
Heat weight — Heat Heat (h[=e]t), n. [OE. hete, h[ae]te, AS. h[=ae]tu, h[=ae]to, fr. h[=a]t hot; akin to OHG. heizi heat, Dan. hede, Sw. hetta. See {Hot}.] 1. A force in nature which is recognized in various effects, but especially in the phenomena of fusion… … The Collaborative International Dictionary of English
capacity — n. (pl. ies) 1 a the power of containing, receiving, experiencing, or producing (capacity for heat, pain , etc.). b the maximum amount that can be contained or produced etc. c the volume, e.g. of the cylinders in an internal combustion engine. d… … Useful english dictionary
Heat capacity — Thermodynamics … Wikipedia
